Juan Monaco of Argentina returns a ball to Guillermo Garcia Lopez of Spain during a second round match at the Suisse Open tennis tournament in Gstaad, Switzerland, Wednesday July 24, 2013. (AP Photo/Keystone,Peter Schneider)

Juan Monaco of Argentina returns a ball to Guillermo Garcia Lopez of Spain during a second round match at the Suisse Open tennis tournament in Gstaad, Switzerland, Wednesday July 24, 2013. (AP Photo/Keystone,Peter Schneider)

Feliciano Lopez of Spain serves a ball to Andrey Kuznetsov of Russia during a second round match at the Suisse Open tennis tournament in Gstaad, Switzerland, Wednesday July 24, 2013. (AP Photo/Keystone,Peter Schneider)

Andrey Kuznetsov of Russia returns a ball to Feliciano Lopez of Spain during a second round match at the Suisse Open tennis tournament in Gstaad, Switzerland, Wednesday July 24, 2013. (AP Photo/Keystone,Peter Schneider)

Mikhail Youzhny of Russia returns a ball to Pablo Andujar of Spain during a second round match at the Suisse Open tennis tournament in Gstaad, Switzerland, Wednesday July 24, 2013. (AP Photo/Keystone,Peter Schneider)